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A facile synthetic strategy was developed for novel Au-loaded magnetic SiO2/carbon yolk-shell ellipsoids (Fe@SiO2-Au@H-C) composing of magnetic Fe@SiO2 yolks, mesoporous carbon shells and numerous sub-3 nm Au nanoparticles (NPs). The SiO2/polymer resin double-shell structures (Fe2O3@SiO2@RF) were prepared by the one-pot extended Stöber method, followed by carbonization-hydrothermal etching to attain...
The recent boom in sensor and optical materials based on graphene oxide (GO) requires the improvement and control of its optoelectronic properties. Here, we report the imaging and spectrum of transmission and fluorescence for monolayer graphene oxide (mGO) in an external electric field. It is demonstrated that the image of mGO reveals pronounced spatial heterogeneity under an electric field, and the...
Free transverse vibrations of single-walled carbon nanocones (SWCNCs) are investigated through beam model and molecular dynamics (MD) simulations. The fundamental frequencies of transverse vibrations of cantilevered SWCNCs with different apex angles, top radii and lengths are obtained from the MD simulations. The Timoshenko beam model provides a better prediction of the frequencies than the Euler–Bernoulli...
We report a Langmuir–Blodgett (LB) approach for highly-efficient fabrication of nanoscrolls from functionalized graphene oxide single sheets. Transmission electron microscope study reveals that the scroll has a tubular structure without caps at its ends. The scrolls align parallel to the moving barriers of the LB equipment and exhibit a loose-dense pattern during the LB compression process. We find...
We demonstrate that Fe impurities in double-walled carbon nantoubes (DWNTs) may be greatly depressed by improving the experimental setup in a floating catalyst CVD method. In the paper, the effect of different experimental parameters on sample purity has been systematically studied. The possible reasons for the decrease of impurity in the DWNT samples prepared with the improved apparatus are discussed...
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